Moose, Mango. I know at least one of you is far more experienced than I am, but what I did, which worked, and which has apparently worked for a lot of other people, did not involved cutting any leaves.
No cutting or welding needed.
This is for a ball joint (1968 and later) beam.
The stack of leaves iside the stock VW beam is like this: One small leaf spring on top, two small leaves laid next to each other under them, followed by four large leaves, stacked, and on bottom two more small leaves next to each other, then the final single little leaf:
-
--
__
__
__
__
--
-
The hole in which this stack fits--both in the center of the beam, where it's anchored by the grub screw, and on the arm ends, anchored by two more screws, is a rectangle with a little rectangular nub on the top and bottom, and a littler nub at the edge to handle the last little leaf.
If you remove any of the small leaves--even all six of them--the other leaves are still just as tightly secured as ever. Your spring rate is reduced to something more reasonable for your car. Or at least for mine.
Oil filled shocks work best for this, and it's important that they be the correct length for the car's suspension. Stock Bug shocks will tend to bottom out, because the stock Bug sits higher than the Speedster (or my particular TD). If the shocks are bottoming, it doesn't matter what you do with the springs, it'll always ride like a rock.
Now, if you're running a kingpin beam, the story is different.